Our Z-Bolt&reg Certified green laser modules push the power envelope and are the brightest, most visible green laser modules allowed by FDA law. Each Z-Bolt&reg Certified green laser module is factory tuned and tested on a laser power meter. These BOLT-5 units are rated at 4.0 to 5.0 mW power output and are 2 to 3 times brighter than stock Class IIIa units ( 1.5 ~ 4.0 mW ). The result is dazzling, green laser brilliance. Z-Bolt&reg Certified Modules are the brightest module available for consumer, retail public use. Economically priced for lab experimentation; as a component in new product designs; for the laser professional or hobbyist.